Peer reviewed publications by year:
(click on titles to download PDFs


  • 46  Fitness variation among host species and the paradox of ineffective rhizobia   V.J. Pahua, P.J.N. Stokes, A.C. Hollowell, J.U. Regus, K.A. Gano-Cohen, C.E. Wendlandt, K.W. Quides, J. Y. Lyu, J.L. Sachs. 2018  Journal of Evolutionary Biology. In Press.
  • 45  Symbiotic nitrogen fixation by rhizobia - the roots of a success story    C. Masson-Boivin, J.L. Sachs. 2018  Current Opinion in Plant Biology  44:7-17 [PDF}
  • 44  Lotus japonicus alters in planta fitness of Mesorhizobium loti dependent on symbiotic nitrogen fixation K.W. Quides, G.M. Stomackin, H.Lee, J.H. Chang, J.L. Sachs. 2017  PLoS One  IN PRESS [PrePrint]
  • 43  Cell autonomous sanctions in legumes target ineffective rhizobia in nodules with mixed infections J.U. Regus, K.W. Quides, M.R. O'Neill, R. Suzuki, E.A. Savory, J.H. Chang, J.L. Sachs. 2017  American Journal of Botany  104 (9):1-14 [PDF]
  • 42  Nitrogen deposition decreases the benefits of symbiosis in a native legume J.U. Regus, C.E. Wendlandt, R. M. Bantay, K.A. Gano-Cohen, N. J. Gleason, A. C. Hollowell, M. R. O'Neill, K. K. Shahin, J.L. Sachs. 2017  Plant and Soil 414:159-170  [PDF] [ESM_1] [ESM_2] [ESM_3] [ESM_4]

  • 41  Non-nodulating Bradyrhizobium spp. modulate the benefits of the legume-rhizobium mutualism K.A. Gano-Cohen, P. Stokes, M.A. Blanton, C.E. Wendlandt, A.C. Hollowell, J.U. Regus, D. Kim, S. Patel, V. J. Pahua, J.L. Sachs. 2016.  Applied and Environmental Microbiology. 82: 5259-5268 [PDF]
  • 40  Metapopulation dominance and genomic-island acquisition of Bradyrhizobium with superior catabolic capabilities     A.C. Hollowell, J.U. Regus, D. Turissini, K.A. Gano, R. Bantay, A. Bernardo, D. Moore, J. Pham, J.L. Sachs. 2016.  Proceedings of the Royal Society of London. 283: 20160496 [PDF] [Supplemental Data]  [Press]
  • 39  Epidemic spread of symbiotic and non–symbiotic Bradyrhizobium genotypes across California       A.C. Hollowell, J.U. Regus, K.A. Gano, R. Bantay, D. Centeno, J. Pham, J.Y. Lyu, D. Moore, A. Bernardo, G. Lopez, A. Patil, S. Patel, Y. Lii, J.L. Sachs. 2016  Microbial Ecology, 71 (3) 700-710 [PDF]

  • 38  Cheaters must prosper: reconciling theoretical and empirical perspectives on cheating in mutualism   E.I. Jones, M.E. Afkhami, E. Akcay, J.L. Bronstein, R. Bshary, M.E. Frederickson, K.D. Heath, J. Hoeksema, J H. Ness, S. Pankey, S.S. Porter, J.L. Sachs, K. Scharnagl, M.L. Friesen2015Ecology Letters [PDF]  doi:10.1111/ele.12507
  • 37  Exploitation of mutualisms  J. L. Sachs . 2015  in: Bronstein, J., ed.  Mutualism, Oxford University Press., Oxford. [Reprints upon request]
  • 36  Engineering microbiomes to improve plant and animal health   U.G. Mueller &. J. L. Sachs . 2015  Trends in Microbiology. [PDF]
  • 35  Lotus hosts delimit the mutualism-parasitism continuum of Bradyrhizobium  Regus, J. U., K.A. Gano,  Holllowell, A.C.,  V. Sofish, J. L. Sachs . 2015  Journal of Evolutionary Biology. 28, 447-458 [PDF]
  • 34  Native California soils are selective reservoirs for multidrug resistant bacteria  Hollowell, A.C., K.A. Gano, G. Lopez, K. Shahin, J. U. Regus, N. Gleason, S. Greater, V. Pahua, J. L. Sachs . 2015  Environmental Microbiology Reports.   7(3), 442-449 [PDF]


    • 33  Specialization-generalization trade-off in a Bradyrhizobium symbiosis with wild legume hosts  Ehinger, M., Mohr, T. J., Starcevich, J. B., Sachs, J. L., Porter, S. S., Simms, E. L. 2014 BMC Ecology. 14:8


    • 32  Efficiency of partner choice and sanctions in Lotus is not altered by nitrogen fertilization  Regus, J. U., Gano, K. A., Hollowell, A. C., Sachs, J. L. 2014 Proceedings of the Royal Society of London. 281, 20132587


    • 31  Evolutionary origins and diversification of proteobacterial mutualists  

      Sachs, J. L., 

      Skophammer, R.G., Bansal, N., Stajich, J. E.  2014


      Proceedings of the Royal Society of London.

      281, 20132146 [PDF]


    • 30  Biological soil crust communities differ in key ecological functions  

      Pietrasiak, N, Regus, J. U.,  Johansen, J. R., Lam, D., Sachs, J. L., 

      Santiago, L. S. 2013

       Soil Biology and Biochemistry 65:168-171 [PDF]

    • 29  The legume-rhizobium symbiosis  Sachs, J. L. Gano, K. A., Hollowell, A. C., Regus, J. U. 2013 Oxford Bibliographies in Ecology [PDF]
    • 28  Mutualistic coevolution of type III effector genes in Sinorhizobium fredii and Bradyrhizobium japonicum  Kimbrel, J. A., Thomas, W. J., Jiang, Y., Creason, A. L., Thireault, C. A. Sachs, J. L., Chang, J. H.  2013 PLoS Pathogens 9: 2, e1003204 [PDF]
    • 27  Origins, evolution and breakdown of bacterial symbioses Sachs, J. L.  2013. Encyclopedia of Biodiversity 2nd Edition, Edited by S. A. Levin [PDF]


    • 26   The origins of cooperative bacterial communities  Sachs, J. L.,  and Hollowell, A. C. 2012. mBIO e00099-12 [PDF]


    • 25   Evolutionary instability of symbiotic function in Bradyrhizobium  Sachs, J. L., Russell, J. E. and Hollowell, A. C. 2011. PLoS One 6:11:e26370 [PDF]
    • 24  Microbially-mediated  Plant Functional Traits Friesen, M., Porter, S., Stark, S. & von Wettberg, Sachs, J. L., E., Martinez-Romero, E. 2011. Annual Review of Ecology Evolution and Systematics. 43: 23-46. [PDF]
    • 23  Evolutionary transitions in bacterial symbiosis Sachs, J.L., Skophammer, R.G., and Regus, J.U. 2011. Proceedings of the National Academy of Sciences USA. 108:10800-10807 [PDF
    • 22  New paradigms for the evolution of beneficial infections Sachs, J.L., Essenberg, C. and Turcotte, M. M. 2011. Trends in Ecology and Evolution. 26: 202-209. [PDF]
    • 21  Inclusive theory and eusociality Abbot, P. et al. 2011 (135 authors). Nature 466:1057  [PDF]


    • 20 Host control over infection and proliferation of a cheater symbiont  Sachs, J.L., Russell, J. E., Lii, Y. E., Black, K. C., Lopez, G., and Patil, A. S. 2010. Journal of Evolutionary Biology 23:1919-1927. [PDF]
    • 19 Symbiont genomics; Our new tangled bank  Medina, M. and Sachs, J.L. 2010. Genomics 95:129-137. [PDF]
    • 18 Origins of cheating and loss of symbiosis in wild Bradyrhizobium Sachs, J.L., Ehinger, E. O., & Simms, E. L. 2010.  Journal of Evolutionary Biology 23:1075-1089. [PDF]


    • 17   In situ phylogenetic structure and diversity of wild Bradyrhizobium communities Sachs, J.L., Kembel, S.W., Lau, A.H., and Simms, E.L.  2009. Applied and Environmental Microbiology 75: 4727-4735. [PDF]


    • 16  The origins of uncooperative rhizobia  Sachs, J.L. and Simms, E.L.  2008. Oikos 117: 961-966.
    • 15  Resolving the first steps to multicellularity Sachs, J.L. 2008. Trends in Ecology and Evolution. 23:245-248.


    • 14 The evolution of cooperative breeding; is there cheating? Sachs, J.L. and Rubenstein, D. R. 2007. Behavioral Processes 76:131-137. [PDF]
    • 13 The evolution of colonial breeding in birds: A test of hypotheses with the red-necked grebe Sachs, J.L., Hughes, C.R., Nuechterlein, G.L., and Buitron, D. 2007. The Auk 124:628-642. [PDF]                            
    • 12 The nature of human culture Sachs, J.L.  2007. Book Review of ‘The Origin and Evolution of Cultures’ 2005 Robert Boyd and Peter J. Richerson, Oxford University Press, New York, U.S.A. Quarterly Review of Biology 82:183-184. [PDF]


    • 11  Pathways to mutualism breakdown Sachs, J.L., and Simms, E.L. 2006. Trends in Ecology and Evolution 21:585-592. [PDF]
    • 10  Cooperation within and among species Sachs, J.L. 2006. Journal of Evolutionary Biology 19:1415-1418. [PDF]
    • 9  A shift to parasitism in the jellyfish symbiont Symbiodinium microadriaticum Sachs, J. L. and Wilcox, T.P. 2006. Proceedings of the Royal Society of London. B. 273:425-429. [PDF]
    • 8  An empirical test of partner choice mechanisms in a wild legume-rhizobium interaction                       Simms, E. L., Taylor, D. L., Povich, J., Shefferson, R. P., Sachs, J. L., Urbina, M., and Tauszick, Y. 2006. Proceedings of the Royal Society of London. B. 273:77-81. [PDF]   
    • 7  A clash of biology and culture. Sachs, J.L.  2006 Book Review of ‘Techno-cultural Evolution, Cycles of Creation and Conflict.’ William McDonald Wallace, Potomac Books, Dulles, Virginia, U.S.A. Quarterly Review of Biology 81:425-426. [PDF]


    • 6   Experimental evolution of conflict mediation between genomes  Sachs, J.L. and Bull, J.J. 2005. Proceedings of the National Academy of Sciences USA 102:390-395. [PDF]  [Press]
    • 5   A biohistory of ascendance and decline Sachs, J.L.  2005. Book Review of ‘The Biology of Civilisation, Understanding Human Culture As a Force In Nature.’ 2004 Stephen Boyden, University of New South Wales Press, Sydney. Quarterly Review of Biology 80:507-508. [PDF]


    • 4 The Evolution of Cooperation Sachs, J. L., Mueller, U. G., Wilcox, T. P., and Bull, J. J. 2004., Quarterly Review of Biology 79:135-160. [PDF]
    • 3   The evolving field of cooperation  2003. Dahlem workshop report. Peter Hammerstein, Ed. Dahlem University Press, Cambridge. Quarterly Review of Biology 79:458-459. [PDF]
    • 2  Red-necked Grebes become semi-colonial when prime nesting habitat is available Nuechterlein, G.L., Buitron, D., Sachs, J.L. and Hughes, C.R. 2003.. Condor. 105: 80-94. [PDF] 
    • 1  Characterization of microsatellite loci for red-necked grebes Podiceps grisegena Sachs, J.L., Hughes, C. R. 1999. Molecular Ecology. 8, 687-688.  Sachs, J.L., Hughes, C. R. 1999. Molecular Ecology. 8, 687-688. [PDF]